correctly update the panel subtitles based on the media connected

app/node/output/viewer/viewer.cpp

@@ -233,6 +233,18 @@ void ViewerOutput::Retranslate()
   }
 }
 
+const QString &ViewerOutput::media_name() const
+{
+  return media_name_;
+}
+
+void ViewerOutput::set_media_name(const QString &name)
+{
+  media_name_ = name;
+
+  emit MediaNameChanged(media_name_);
+}
+
 const QVector<TrackOutput *>& ViewerOutput::Tracks() const
 {
   return track_cache_;

app/node/output/viewer/viewer.h

@@ -74,6 +74,9 @@ public:
 
   virtual void Retranslate() override;
 
+  const QString& media_name() const;
+  void set_media_name(const QString& name);
+
 protected:
   virtual void DependentEdgeChanged(NodeInput* from) override;
 
@@ -100,6 +103,8 @@ signals:
 
   void TrackHeightChanged(Timeline::TrackType type, int index, int height);
 
+  void MediaNameChanged(const QString& name);
+
 private:
   QUuid uuid_;
 
@@ -121,6 +126,8 @@ private:
 
   rational timeline_length_;
 
+  QString media_name_;
+
 private slots:
   void UpdateTrackCache();